Bao Bao, the Giant Panda cub is seen by the media for the first time January 6, 2014 inside his glass enclosure at the National Zoo in Washington, DC, a few days before going on display to the general public. Paul J. Richards, AFP/Getty Images

Bao Bao is measured as she is about to turn 100 days old, at the Smithsonian National Zoo in Washington. Abby Wood, AP

Bao Bao at her giant panda exhibit at the Smithsonian National Zoo. She now weighs 40 pounds. Abby Smith, Smithsonian National Zoo Flickr

Baby giant panda Bao Bao explores her new home with her mother, Mei Xiang at the Smithsonian? National Zoo. Smithsonian National Zoo